NWS Sioux Falls SDXH.W 0001June 29, 2026
Extreme Heat Warning: Sioux, O'Brien, Clay and 7 more, IA and NE
The National Weather Service office in Sioux Falls issued an extreme heat warning for Sioux, O'Brien, Clay and 7 more in Iowa, Nebraska, South Dakota, which was in force until 9:00 p.m. local time on June 29. It was the 1st extreme heat warning the NWS office in Sioux Falls issued in 2026. Iowa had 5 extreme heat warnings in June 2026, against 1 in an average June of 2008-2025 (Iowa's extreme heat warnings by year).
ExpiredWarning
In force for 20.3 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Sioux Falls SD
- Area
- Sioux, O'Brien, Clay and 7 more
- State
- Iowa
- Level
- Warning
- Issued
- 12:42 a.m. CDT, June 29, 2026
- Expires
- 9:00 p.m. CDT, June 29, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KFSD XH.W 0001
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
* WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and southeast South Dakota. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
What the agency told people to do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.